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Key findings

• Three velocity components were identified in the hydrogen-like and helium-like iron lines, with maximum velocities of 2000–3000 k...

Pulsars are highly magnetised, rapidly rotating neutron stars — the ultra-dense remnants left behind when a massive star ends its life in a supernova explosion. They emit narrow beams of radio waves that sweep across space like a lighthouse, producing precise pulses detectable by radio telescopes on Earth. Some pulsars display a puzzling behaviour called nulling, where their radio emission abruptly becomes undetectable, or drops far below its nor...

AD Leonis (AD Leo) is an active M-dwarf — a small, cool red star — located about 16 light-years from Earth that is known for producing frequent and energetic flares. Stellar flares are intense, brief brightenings caused by magnetic reconnection, a process in which tangled magnetic field lines snap and realign, releasing a burst of energy as light across many wavelengths, similar to solar flares but often far more powerful relative to the star's s...

Gliese 436 b is a warm Neptune — a planet roughly the size and mass of Neptune — orbiting the red dwarf star Gliese 436, located about 33 light-years from Earth. Astronomers used the Keck II telescope on Mauna Kea, Hawaii, fitted with an instrument called KPIC (Keck Planet Imager and Characterizer). KPIC routes starlight through a hair-thin single-mode optical fiber before feeding it into a high-resolution spectrograph — a technique that suppress...

Astronomers comparing new James Webb Space Telescope data with 20-year-old Spitzer observations have discovered significant changes in the dusty, planet-forming disks surrounding two young stars, Sz 96 and IP Tau. The study found that the infrared light emitted by silicates—minerals similar to sand or rocks—shifted in brightness by up to 35%, suggesting that the inner structure of these disks is physically changing over time. Furthermore, the ...